#include<stdio.h>
struct student
{
    int age;
    double pay;
    int height;
    char id[13];
};
union stu
{
    int a;
    char b[5];
};
int main()
{
    // std.age=18;
    // std.pay=4782.21;
    // std.height=178;
    // std.id[9]="202200205";
    struct student std={18,2458.7180,176,"202200205"}; 
    union stu s;
    printf("%d  ",sizeof(s));
    printf("%d  ",sizeof(std));
}